grub4dos
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chenall
grubefi - add 'shell' command to run UEFI shell?
Useful if booted via grub2 or other efi loader. Can go straight to UEFI shell.
to run UEFI shell
Which "uefi shell" to run? Is it the one that is embedded in the UEFI firmware or where?
yes - embedded UEFI shell if possible. same as 'shell' command in grubfm?
No.
shell.mod in grub2 comes with a UEFI Shell application.
https://raw.githubusercontent.com/a1ive/grub/master/include/grub/i386/efi/shell_efi.h
There is no way for an external program to load the built-in shell unless it is set as a startup item (Boot####) in the UEFI settings page.
Is there a way to boot the shell.efi ? https://github.com/tianocore/edk2/blob/UDK2018/ShellBinPkg/UefiShell/X64/Shell.efi It does not seem to work using chainloader...
https://github.com/tianocore/edk2/blob/UDK2018/ShellBinPkg/UefiShell/X64/Shell.efi
chainloader /boot/Shell.efi
boot
works on VmWare Player.
I tested on VBox 5 and IdeaPad 300.
- UEFI64 boot to a1ive grubfm
- boot to bootx64.efi of grub4efi from grubfm
- then run chainloader shell.efi from grub4efi shell it just returns back to command line...
On Asus Z87 PC. both grubfm and grub4efi try to run it and then hang. grub4efi actually shows the device list output by the efi shell console but then hangs. Seems like the shell.efi code is rather fussy...?
On Asus Z87 PC. both grubfm and grub4efi try to run it and then hang. grub4efi actually shows the device list output by the efi shell console but then hangs.
do not use graphical mode. switch to text mode (terminal_output console) before chainloading shell.efi.
Seems like the shell.efi code is rather fussy...?
Yes.
Thanks! Seems to work for grubfm. But how do we switch back to pure console mode for grub4efi once we are in graphics mode? I tried graphicsmode 3 but that didn't help. also terminal console command any suggestions?
it works if I put commands in main menu.lst for grub4efi. So I need to undo the graphicsmode change somehow...